BEST USE: Backpacking & Camping
WEIGHT: 9.3 oz | 263 g
LENGTH: 6 ft | 183 cm
PACKED SIZE: 5.75 x 4 in | 15 x 11 cm
Shipping & Returns
Our warehouse is actively shipping orders from 8am to 1pm MST Monday through Friday. Most orders ship in one business day, but the transit time can take up to 7 days, depending on your distance from Boulder, Colorado.
2nd Day and Next Day Air orders will ship same day if placed by 1pm MST, Monday-Friday (except holidays).
All orders are eligible for fast and easy returns within 60 days of purchase.
For more details, please check out our Help Center
The THERMOLITE® Reactor Compact sleeping bag liner is the ideal choice for gram counters under six feet who want to add warmth to their sleep system. The world’s first ‘hybrid’ sleeping bag liner uses a combination of two weights of THERMOLITE® fabric, with the warmer fabric strategically positioned across the torso and in the footbox. The THERMOLITE® fibers work like the hollow structure of a polar bear's fur, which traps extra insulating air. The Reactor Compact Plus keeps your sleeping bag clean, plus it's super easy to wash.
The Reactor Series Sleeping bag liners, the Venture, Traverse and Basecamp synthetic Sleeping Bags and the foot boxes of the Women’s Altitude and Journey down Sleeping Bags use hollow core THERMOLITE® fiber to add warmth. These fibers trap extra air for insulation (just like the hollow-cores of polar bear or caribou fur). In the liners, the knitted THERMOLITE® fabric is soft and stretchy and comes in three different weights: 80g/m² fabric used in the Reactor and the underside of the Compact Plus liners; a 110g/m² fabric which is used in the Extreme, and the core and foot box of the Compact Plus liner; and the Fleece, the warmest of all the fabrics. THERMOLITE® is also used in the Air Sprung Cell sleeping mats.
Added WarmthUp to 20°F / 11°C
Best UseBackpacking, Camping & Winter Camping
Comes WithUltra-Sil stuff sack
Material(s)Thermolite polyester fabric